You will need at least 3 players in order to get this achievement. You can start a Ranked Match though on this game with 2 players.
To get this achievement, you need to meet up in a certain area on the map, and get the person who is on their own to shoot one of the players on the opposite team, until they are downed. Their partner just needs to go up to them, and press
to revive them. As soon as they're revived, the other player can shoot them again with a Pistol to down them quicker. The achievement will unlock as soon as you've got your 10th revive.
Note: This has to be done in one Ranked Conquest Match, so I recommend you create or search for a boosting session for a chance to get this.